Gilliss \gi-lli-ss\ as a boy's name is a variant of Giles (Greek) and Gillies (Scottish, Gaelic), and the meaning of Gilliss is "small goat; servant of Jesus".

The baby name Gilliss sounds like Gillis, Gilles and Ghillies. Other similar baby names are Williss, Elliss, Gillion, Gillian, Holliss, Willis and Willess.